/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.aws.sqs;



import com.amazonaws.services.sqs.model.Message;

import com.bff.gaia.unified.sdk.io.UnboundedSource;

import com.bff.gaia.unified.vendor.guava.com.google.common.base.Objects;

import com.bff.gaia.unified.vendor.guava.com.google.common.collect.ImmutableList;



import java.io.Serializable;

import java.util.Collection;

import java.util.List;

import java.util.Optional;



class SqsCheckpointMark implements UnboundedSource.CheckpointMark, Serializable {



  private final List<Message> messagesToDelete;

  private final transient Optional<SqsUnboundedReader> reader;



  public SqsCheckpointMark(SqsUnboundedReader reader, Collection<Message> messagesToDelete) {

    this.reader = Optional.of(reader);

    this.messagesToDelete = ImmutableList.copyOf(messagesToDelete);

    ;

  }



  @Override

  public void finalizeCheckpoint() {

    reader.ifPresent(r -> r.delete(messagesToDelete));

  }



  List<Message> getMessagesToDelete() {

    return messagesToDelete;

  }



  @Override

  public boolean equals(Object o) {

    if (this == o) {

      return true;

    }

    if (o == null || getClass() != o.getClass()) {

      return false;

    }

    SqsCheckpointMark that = (SqsCheckpointMark) o;

    return Objects.equal(messagesToDelete, that.messagesToDelete);

  }



  @Override

  public int hashCode() {

    return Objects.hashCode(messagesToDelete);

  }

}